public abstract class Money1 implements Comparable<Money> {
	public abstract long getAmount();
	public abstract String toString();
	public abstract int compareTo(Money m);
	public abstract boolean equals(Object obj);
	public abstract ins hashCode();
	public abstract Money plus(Money m);
	public abstract Money minus(Money m);
	public abstract Money times(double factor);
	public abstract Money divide(double divisor);
	public abstract Money negate();
}
